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| 1 | Study on cosmogenic activation in germanium detectors for future tonne-scale CDEX experiment显示文摘A study on cosmogenic activation in germanium was carried out to evaluate the cosmogenic background level of natural and ^(70)Ge depleted germanium detectors. The production rates of long-lived radionuclides were calculated with Geant4 and CRY.Results were validated by comparing the simulated and experimental spectra of CDEX-1B detector. Based on the validated codes, the cosmogenic background level was predicted for further tonne-scale CDEX experiment. The suppression of cosmogenic background level could be achieved by underground germanium crystal growth and high-purity germanium detector fabrication to reach the sensitivity requirement for direct detection of dark matter. With the low cosmogenic background, new physics channels,such as solar neutrino research and neutrinoless double-beta decay experiments, were opened and the corresponding simulations and evaluations were carried out. | JingLu Ma Qian Yue ShinTed Lin Henry Tsz-King Wong JinWei Hu LiPing Jia Hao Jiang Jin Li ShuKui Liu ZhongZhi Liu Hao Ma WeiYou Tang Yang Tian Li Wang Qing Wang Yi Wang LiTao Yang Zhi Zeng | 2019 | Science China(Physics,Mechanics & Astronomy)2019，62，1： | 5 |
| 2 | First experimental constraints on WIMP couplings in the effective field theory framework from CDEX显示文摘We present weakly interacting massive particles(WIMPs) search results performed using two approaches of effective field theory from the China Dark Matter Experiment(CDEX), based on the data from both CDEX-1B and CDEX-10 stages. In the nonrelativistic effective field theory approach, both time-integrated and annual modulation analyses were used to set new limits for the coupling of WIMP-nucleon effective operators at 90% confidence level(C.L.) and improve over the current bounds in the low mχregion. In the chiral effective field theory approach, data from CDEX-10 were used to set an upper limit on WIMP-pion coupling at 90% C.L. We for the first time extended the limit to the m_(χ)<6 GeV/c^(2) region. | Yi Wang Zhi Zeng Qian Yue LiTao Yang KeJun Kang YuanJing Li Mehment Agartioglu HaiPeng An JianPing Chang JingHan Chen YunHua Chen JianPing Cheng Cheng Yi Chiang WenHan Dai Zhi Deng ChangHao Fang XinPing Geng Hui Gong QiuJu Guo XuYuan Guo HongJian He Li He ShengMing He JinWei Hu TuChen Huang HanXiong Huang HaiTao Jia LiPing Jia Xi Jiang HauBin Li JianMin Li Jin Li MingXuan Li RenMingJie Li Xia Li YuLan Li Bin Liao FongKay Lin ShinTed Lin ShuKui Liu YanDong Liu Yu Liu YuanYuan Liu ZhongZhi Liu Hao Ma YuCai Mao QiYuan Nie JinHua Ning Hui Pan NingChun Qi Jie Ren XiChao Ruan ChangSong Shang Vivek Sharma Ze She Lakhwinder Singh Monoj Kumar Singh TianXi Sun ChangJian Tang WeiYou Tang Yang Tian GuangFu Wang Li Wang Qing Wang Yu Chen Wang YunXiang Wang Zhen Wang Henry Tsz-King Wong ShiYong Wu YuCheng Wu HaoYang Xing Yin Xu Tao Xue YuLu Yan Nan Yi ChunXu Yu HaiJun Yu JianFeng Yue Ming Zeng BingTao Zhang Lei Zhang FengShou Zhang ZhenYu Zhang KangKang Zhao MingGang Zhao JiFang Zhou ZuYing Zhou JingJun Zhu | 2021 | Science China(Physics,Mechanics & Astronomy)2021，64，8： | 3 |
| 3 | First results on ^(76)Ge neutrinoless double beta decay from CDEX-1 experiment显示文摘We report the first results on ^(76)Ge neutrinoless double beta decay from stage one of the China dark-matter experiment(CDEX).A p-type point-contact high-purity germanium detector with a mass of 994 g has been installed to detect neutrinoless double beta decay events, as well as to directly detect dark matter particles. An exposure of 304 kg d has been analyzed over a wide spectral band from 500 keV to 3 MeV. The average event rate obtained was about 0.012 counts per keV per kg per day over the 2.039 MeV energy range. The half-life of ^(76)Ge neutrinoless double beta decay derived based on this result is T^(0ν)1/2>6.4×10^(22) yr(90% C.L.). An upper limit on the effective Majorana-neutrino mass of 5.0 eV has been achieved. | Li Wang Qian Yue KeJun Kang JianPing Cheng YuanJing Li TszKing Henry Wong ShinTed Lin JianPing Chang JingHan Chen QingHao Chen YunHua Chen Zhi Deng Qiang Du Hui Gong Li He QingJu He JinWei Hu HanXiong Huang TengRui Huang LiPing Jia Hao Jiang HauBin Li Hong Li JianMin Li Jin Li Jun Li Xia Li XueQian Li YuLan Li FongKay Lin ShuKui Liu Hao Ma JingLu Ma XingYu Pan Jie Ren XiChao Ruan ManBin Shen Vivek Sharma Lakhwinder Singh Manoj Kumar Singh Manoj Kumar Singh Arun Kumar Soma ChangJian Tang WeiYou Tang ChaoHsiung Tseng JiMin Wang Qing Wang ShiYong Wu YuCheng Wu HaoYang Xing Yin Xu Tao Xue LiTao Yang SongWei Yang Nan Yi ChunXu Yu HaiJun Yu WeiHe Zeng XiongHui Zeng Zhi Zeng Lan Zhang YunHua Zhang MingGang Zhao Wei Zhao JiFang Zhou ZuYing Zhou JingJun Zhu WeiBin Zhu ZhongHua Zhu | 2017 | Science China(Physics,Mechanics & Astronomy)2017，60，7： | 3 |
| 4 | Porous SiC ceramics fabricated by quick freeze casting and solid state sintering显示文摘Porous SiC ceramics with uniform microstructure were fabricated by quick freezing in liquid nitrogen and solid state sintering.Poly(vinyl alcohol)(PVA) was added as binder and pore morphology controller in this work.The microstructure and mechanical properties of porous SiC ceramics could be controlled by the composition of the aqueous slurries.Both solid content of the slurries and PVA content impacted on the pore structures and mechanical properties of the porous SiC ceramics.The solid content of slurries and PVA content varied from 60 to 67.5 wt%and 2-6 wt%,respectively.Besides,the grain morphology of ceramics was also tailored by changing the sintering temperature from 2050 to 2150 ℃.Porous SiC ceramics with an average porosity of 42.72%,flexural strength of 59.28 MPa were obtained at 2150 ℃ from 67.5 wt% slurries with 2 wt% PVA. | Feng Wang Jinwei Yin Dongxu Yao Yongfeng Xia Kaihui Zuo Yuping Zeng | 2017 | Progress in Natural Science:Materials International2017，27，3： | 2 |
| 5 | The improved mechanical properties of Al matrix composites reinforced with oriented β-Si3N4 whisker显示文摘The β-Si3N4 whiskers (β-Si3N4w) reinforced A1 matrix com posites were first fabricated by hot pressing, then treated through hot extrusion. The microstructure characterization dem onstrated the preferred orientations of both β-Si3N4w and A1 grains in the as-extruded composites. It indicated th at β-Si3N4w were aligned along the extrusion direction and A1 grains exhibited a distinct <111>ai texture. The interface betw een β-Si3N4w and A1 was in a good bonding status without voids and reaction products. Effects of extrusion process on the mechanical properties of com posites were also investigated. The results indicated the extrusion process had a prom inent strengthening effect on the mechanical properties of composites. The maxim umyield strength and ultim ate tensile strength of com posites reached up to 170 and 289 MPa, respectively, accompanied by a 12.3% elongation at fracture w hen the w hisker fraction was 15 vol.%. This im provem ent was collectively attributed to the densification of composites, the strong interface, and the preferred orientation inside composites. The yield strength of the composites reinforced with 5 vol.%β-Si3N4w corresponded well w ith the theoretical value from different strengthening mechanisms. | Chenxu Zhang Yu-Ping Zeng Dongxu Yao Jinwei Yin Kaihui Zuo Yongfeng Xia Hanqin Liang | 2019 | Journal of Materials Science & Technology2019，35，7： | 2 |
| 6 | Studies on polypyrrole modified nafion membrane for vanadium redox flow battery显示文摘 | Jie Zeng Chunping Jiang Yaohui Wang Jinwei Chen Shifu Zhu Beijun Zhao Ruilin Wang | 2007 | Electrochemistry Communications2007，，3： | 1 |
| 7 | In-situ hydrothermal synthesized γ-Al_2O_3/O-g-C_3N_4 heterojunctions with enhanced visible-light photocatalytic activity in water splitting for hydrogen显示文摘In this work,γ-Al_2O_3 and hydrogen peroxide treated g-C_3N_4(O-g-C_3N_4) were combined through a novel in-situ hydrothermal method to form heterojunction structured photocatalysts.These photocatalysts were characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM),Fourier transform infrared spectroscopy(FT-IR),X-ray photoelectron spectroscopy(XPS),UV–vis diffuse reflectance spectroscopy and photoluminescence spectroscopy(PL).FT-IR results indicate that oxygen functional groups can be grafted on the surface of O-g-C_3N_4 by hydrogen peroxide treatment.The visible light photocatalytic hydrogen evolution rate was investigated in 10 vol% TEOA aqueous solution.The optimal Al_2O_3 mass content is set to be 20 wt% and the corresponding hydrogen evolution rate is 1288 μmol/h/g which is approximately 6,3 folds that of pristine g-C_3N_4 and O-g-C_3N_4 respectively and 1.6 folds that of mechanical mixed composite with the same Al_2O_3 mass content.The photocurrent density–time curves were carried out under visible light illumination for four on–off cycles.The electrochemical impedance spectroscopy(EIS) measurements verified the enhanced separation efficiency of electron–hole pairs.This work raised a new method to form the heterojunction structured photocatalysts and achieved a remarkable improvement of the photocatalytic activity in water splitting for hydrogen under visible light irradiation. | Yu Wang Yaping Zeng Boqiao Li Anqi Li Ping Yang Liu Yang Gang Wang Jinwei Chen Ruilin Wang | 2016 | Journal of Energy Chemistry2016，25，4： | 1 |
| 8 | Studies on polypyrrole modified nafion membrane for vanadium redox flow battery显示文摘 | Jie Zeng Chunping Jiang Yaohui Wang Jinwei Chen Shifu Zhu Beijun Zhao Ruilin Wang | 2007 | Electrochemistry Communications2007，，3： | 1 |
| 9 | Studies on polypyrrole modified Nafion membrane for vanadium redox flow battery显示文摘 | Zeng Jie Jiang Chunping Wang Yaohui Chen Jinwei Zhu Shifu Zhao Beijun Wang Ruilin | | 0，，： | 1 |
| 10 | Studies on polypyrrole modified Nafion membrane for vanadium redox flow battery显示文摘 | Zeng Jie Jiang Chunping Wang Yaohui Chen Jinwei Zhu Shifu Zhao Beijun WangRuilin | 2008 | Electrochemistry Communications2008，10，3： | 1 |
| 11 | Enhancement of silicon sub‑bandgap photodetection by helium‑ion implantation显示文摘Silicon sub-bandgap photodetectors can detect light at the infrared telecommunication wavelengths but with relatively weak photo-response.In this work,we demonstrate the enhancement of sub-bandgap photodetection in silicon by helium-ion implantation,without afecting the transparency that is an important benefcial feature of this type of photodetectors.With an implantation dose of 1×10^(13)ions/cm^(2),the minimal detectable optical power can be improved from−33.2 to−63.1 dBm,or,by 29.9 dB,at the wavelength of 1550 nm,and the photo-response at the same optical power(−10 dBm)can be enhanced by approximately 18.8 dB.Our work provides a method for strategically modifying the intrinsic trade-of between transparency and strong photo-responses of this type of photodetectors. | Zhao Wang Xiaolei Wen Kai Zou Yun Meng Jinwei Zeng Jian Wang Huan Hu Xiaolong Hu | 2023 | Frontiers of Optoelectronics2023，16，4： | 0 |
| 12 | One-pot synthesis of Bi2Se3 nanostructures with rationally tunable morphologies显示文摘形状控制证明了是定制双性人 2 为许多应用程序的 Se 3 nanostructures。这里,三不同双性人 2 Se 3 nanostructures,即,螺线类型 nanoplates,光滑的 nanoplates,和树枝状的 nanostructures,被在合成系统操作过度饱和水平准备。这机制研究显示在低过度饱和,那在生长能引起在双性人 2 Se 3 粒子连续地被增加,导致螺线类型 nanoplates 的形成。在中间的过度饱和,非结晶的双性人 2 Se 3 粒子和随后的再结晶导致了光滑的 nanoplates 的形成。而且在高过度饱和,多晶的双性人 2 开始形成的 Se 3 核心,在哪个双性人 2 Se 3 发生了。这个工作不仅推进我们生长机制的理解而且提供一条新途径控制双性人 2 Se 3 nanostructures。 | Xianli Liu Jinwei Xu Zhicheng Fang Lin Lin Yu Qian Youcheng Wang Chunmiao Ye Chao Ma Jie Zeng | 2015 | Nano Research2015，8，11： | 0 |
| 13 | Influence of Yb_2O_3-MgO on Mechanical Properties and Thermal Conductivity of Silicon Nitride Ceramics via Gas Pressure Sintering显示文摘In this work,Yb2O3 and Mg O were used as sintering aids in preparing silicon nitride ceramics by gas pressure sintering( 0. 6 MPa N2atmosphere) to investigate how the amounts of Yb2O3- Mg O influence the mechanical properties and thermal conductivity of silicon nitride ceramics. The total contents of Yb2O3- Mg O added were 1 mol%,2 mol%,4 mol%,6 mol%,8 mol%,10 mol%,12 mol%,14 mol%,keeping the Yb2O3-Mg O molar ratio of 1 ∶ 1 steadily. Curves of the relative density,thermal conductivity and bending strength plotted against the aids content present a ‘mountain'shape with a maximum at nearly 10 mol% aids. The fracture toughness increased with the amounts of additives up to10 mol% and decreased slightly thereafter. The mechanical properties and thermal conductivity were almost proportional to the amount of the additives before10 mol%. When the content of aids exceeded 10 mol%,it would weaken the mechanical properties and thermal conductivity of the ceramics. The optimum content of Yb2O3- Mg O was 10 mol% by gas pressure sintering( 0. 6MPa) at 1 850 ℃ for 4 h,which led to a relative density of 98. 9%,a flexural strength of( 966 ± 38)MPa as well as a fracture toughness of( 6. 29 ± 0. 29)MPa·m1 /2and thermal conductivity of 82 W /( m·K). | LIN Sen YAO Dongxu XIA Yongfeng ZUO Kaihui YIN Jinwei ZENG Yuping | 2015 | China's Refractories2015，24，3： | 0 |
| 14 | Microstructure and Mechanical Properties of Cu Matrix Composites Reinforced by TiB_(2)/TiN Ceramic Reinforcements显示文摘Cu matrix composites reinforced by TiB_(2)/TiN ceramic reinforcements(Cu/TBN composites)were prepared by hot pressing method.Prior to the hot pressing,Cu/TiB_(2)/TiN composite powders(CTBN powders),which were used as the starting materials of Cu/TBN composites,were fabricated by self-propagating high-temperature synthesis method.The CTBN particles were found to be in a special core–shell structure with a Cu–Ti alloy core and a TiB_(2)/TiN ceramic shell.The test results presented obvious improvements in mechanical properties.The highest ultimate tensile strength reached up to 297 MPa,77 MPa higher than that of Cu.And the highest hardness reached up to 70.7 HRF,15.7 HRF higher than that of Cu.A comparative study indicated that the core–shell structured particles could bring about more obvious strengthening eff ect than the traditional irregularly shaped particles,which was due to the improved Cu/ceramics interfacial bonding,the linkage strengthening effect of both TiB_(2) and TiN,and higher load bearing ability of the core–shell structured reinforcements. | Jinwei Yin Peilong Zhou Hanqin Liang Dongxu Yao Yongfeng Xia Kaihui Zuo YuPing Zeng | 2020 | Acta Metallurgica Sinica(English Letters)2020，33，12： | 0 |
| 15 | Interrogating imaginary optical force by the complex Maxwell stress tensor theorem显示文摘The complex Maxwell stress tensor theorem has been developed to relate the imaginary optical force,reactive strength of canonical momentum and total optical force of a nanoparticle,which is essential to perfect optical force efficiency. | Jinwei Zeng Jian Wang | 2023 | Light(Science & Applications)2023，12，1： | 0 |
| 16 | Construction of Carbon-Coated Cobalt Sulfide Hybrid Networks Inter-Connected by Carbon Nanotubes for Performance-Enhanced Potassium-Ion Storage显示文摘Because of its high theoretical capacity,transition metal sulfides have always been regarded as promising anode materials for potas-slum-ion batteries.However,It is difficult for us to make use of transition metal sulfides due to their low conductivity,poor ionic dif-fusivity,sluggish reaction kinetics and severe volume expansion.Here,we developed a novel carbon-coated CoSx@CNT material with carbon nanotubes inter-connected(CCS@CNT),which shows an excellent potassium storage performance with a specific capacity of 550 mA·h·g^(-1) under the current of 50 mA·g^(-1) and 296 mA·hg^(-1) at 1000 mA·g-1.The carbon layer can effectively alleviate volume ex-pansion during charging and discharging process.And this special structure of inter-connected hybrid networks with CNTs greatly improves the electron transport,ion diffusion coefficient and reaction kinetics of the material. | Xuehao Zeng Huigang Tong Shi Chen Jian Lu Changlai Wang Jinwei Tu Pengcheng Wang Qianwang Chen | 2022 | Chinese Journal of Chemistry2022，40，11： | 0 |
| 17 | A Survey on Face Anti-Spoofing Algorithms显示文摘The development of artificial intelligence makes the application of face recognition more and more extensive,which also leads to the security of face recognition technology increasingly prominent.How to design a face anti-spoofing method with high accuracy,strong generalization ability and meeting practical needs is the focus of current research.This paper introduces the research progress of face anti-spoofing algorithm,and divides the existing face anti-spoofing methods into two categories:methods based on manual feature expression and methods based on deep learning.Then,the typical algorithms included in them are classified twice,and the basic ideas,advantages and disadvantages of these algorithms are analyzed.Finally,the methods of face anti-spoofing are summarized,and the existing problems and future prospects are expounded. | Meigui Zhang Kehui Zeng Jinwei Wang | 2020 | Journal of Information Hiding and Privacy Protection2020，2，1： | 0 |
| 18 | Effect of Pore Size on Properties of Highly Porous Silica Ceramic Foams for Heat Insulation显示文摘Highly porous silica ceramics with different pore sizes were fabricated by adjusting the mixed surfactants addition.The effect of the pore size on the cold compressive strength and the thermal conductivity of the ceramics was researched.The results show that the smaller pore size can improve the compressive strength and the thermal conductivity.With the mixed surfactants addition increasing from 0.1 mass%to 0.4 mass%,the porosity is close,in the range of 88.10%-88.31%,and the average pore size decreases from 190μm to 97μm;the compressive strength is enhanced from 2.97 MPa to 3.55 MPa;and the thermal conductivity decreases from 0.104 W·m-1·K-1 to 0.089 W·m-1·K-1. | DU Zhongpei YAO Dongxu XIA Yongfeng ZUO Kaihui YIN Jinwei LIANG Hanqin ZENG Yuping | 2020 | China's Refractories2020，29，4： | 0 |
| 19 | Creation and erasure of polar bubble domains in PbTiO_(3)films by mechanical stress and light illuminations显示文摘The controllable manipulation of polar topological structures(e.g.skyrmion bubble)in ferroelectric materials have been considered as a cornerstone for future programmable nano-electronics.Here,we present the effective creation and erasure of polar bubble states PbTiO_(3)(PTO)multilayers trigged by mechanical stress and light illumination,respectively.It was found that applying atomic force microscope(AFM)tip force can induced formation of nanoscale bubble domains from the initial monodomain state.Moreover,the created bubble domain can be eliminated by exposure to ultraviolet or infrared light illumination.The above results can be understood by modulation of depolarization screening charges and bias fields,as reflected by scanning Kelvin potential microscopic(SKPM)observations,whereby the flexoelectric effect from the tip force tends to remove the screening charges on top surface and modulate the bias field that favors the formation of bubble state while light illumination tends to recover the screen charges and favor the monodomain state.The results provide a good example for multi-field manipulation of polar topologies,which might create a new avenue towards the immerging new concept electronic devices. | Xingchen Zhang Hongying Chen Guo Tian Wenda Yang Zhen Fan Zhipeng Hou Deyang Chen Min Zeng Minghui Qin Jinwei Gao Xingsen Gao Jun-Ming Liu | 2023 | Journal of Materiomics2023，9，4： | 0 |
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